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mezya [45]
4 years ago
10

Compare and contrast heat waves and cold waves

Chemistry
1 answer:
poizon [28]4 years ago
7 0
Ok they are both can formed by the same high pressure system . the heat waves are extended periods of above-normal temperatures . but the cold wave is an extended periods of below normal temperatures
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Systematic error is defined as:_______.
Andru [333]

Answer:

The correct answer is option d.

Explanation:

It is defined as repeatable and consistent error associated with a faulty equipment. It a fixed amount of deviation of a measurement from the actual measurement.

These error usually caused by incorrectly calibrated instruments or by an incorrect use of the instruments.

For example: observational error , interference of environment etc.

5 0
4 years ago
Taylor mixes two liquids together in a beaker. A solid forms at the bottom of the beaker, and the liquid changes from pink to bl
Vedmedyk [2.9K]

The answer is actually D. The pH of the products can be different from the pH of the reactants. Hope this helps :)

8 0
4 years ago
Read 2 more answers
Balancing Chemical Equation<br> C=H2=CH4
svlad2 [7]

Answer:

C + 2H2 ⇒ CH4

Explanation:

In order to balance a chemical equation you need to make sure that the number of atoms on both sides are equal

C + H2 = CH4

C = 1

H = 2

Products:

C = 1

H = 4

H2 = 2 × 2 = 4

C + 2H2 ⇒ CH4

Hope this helps.

4 0
3 years ago
Feeding levels within an ecosystem are
alisha [4.7K]

Answer:

C. trophic levels

Explanation:

Trophic levels are the feeding positions of all organisms in a specific ecosystem. There are five main trophic levels, or feeding levels.

-----------

Habitats are the environment in which organisms live. They are not feeding levels.

Taxonomic levels are a way of classifying species. They consist of (in order) domain, kingdom, phylum, class, order, family, genus, and species. They are not feeding levels.

Cladograms are branching diagrams that show the relationship between multiplt organisms/species. It too is not a feeding level.

Thus, is answer is C.

hope this helps!

3 0
2 years ago
why is there a dip in ionization energies between the elements Be and B, between Mg and Al, and between Ca and Ga?
expeople1 [14]
Be and B: Be is 1s2 2s2 and B is 1s2 2s2 2p1
Be has full 2 orbitals and so does B but B only has 1 electron in p so it is really unstable and easy to react. So there is a dip in ionization energies. The other questions are similar to this so if you need, feel free to ask me
5 0
3 years ago
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